Sparking coil with multiple winding for ignition and like purposes.



PATENTED DEC. 17, 1907.

No. l873,954

A. MICHEL.

SPARKING COIL WITH MULTIPLE WINDING POR IGNITIONIAND LIKE PURPOSES.

APYLIOATION FILED Nov. 2o. 1905.

No. 873,954. v PATENTED DEC. 17, 1907.

A. MICHEL. `SPARKING COIL WITH MULTIPLE WINDING POR IGNITION AND LIKE y PURPOSES.

APPLICATION IILED NOV.20'1905.

2 SHBETS-SHEET 2.

f MQMM am mwdmnwm UNITED VSTATES PATENT OFFICE.

AUGUSTE MICHEL, OF PARIS, FRANCE.

SPARKING COIL WITHV MULTIPLE WINDING FOR IGNITION ANI) LIKE PURPOSES.

Specification of Letters 'atent.`

Patented Dec. 1'7, 1907.

Application-Bled November 20.1905. Serial No. 288.129.

To all whom 'it may concern:

Be it known that I, AUGUSTE MICHEL, a citizen of France, residing at Paris, France, have invented a new and useful Improved Sparking Coil with Multiple Winding for Ignition and Like Purposes, (for which I have obtained a patent in France, N o. 355,678, dated June 28, 1905; in Belgium, No. 185,820, July 20, 1905; in England, No. 14,959, July 20, 1905,) of which the following -is a specification.

The present invention has for its object a sparking coil with multiple winding, especially devised for the ignition of explosion liv-motors, the said system permittingof the supply of'the sparking terminals either by means of magnetos or by means' of a source of electric currentof any kind.

The essential feature of this system consists in having the primary circuit of the coil formed by means of two windings. The rst of these windings is connected at 'one end to one of the poles of the magneto and its other end is connected to' earth. The

second winding has one of its ends connected to one of theterminals of the second source of electric current (accumulators, batteries, etc.) and its other end is connected to an interrupter which is also in connection with earth. A suitable switch permits of connecting the coil wound in this manner either with the magneto or with the second source of current. 4

In order to make the description clearer,

the invention is illustrated by Way of eX-' ample in the accompanying drawing.

Figure 1 is a complete diagram of a coil constructed according to the present invention including the connections which it requires. Figs. 2 and 3 are diagrams of modiiications of the construction of the said coil. Fig. 4 is a (li'agrammatical view illustrating my invention ap lied to an explosive engine.

Referring to 1g. 1, it will be seen that the winding 1 of a magneto 2 is connected on the one hand to earth at m1 and on the other hand by the interposition of a collector with brush 3 and of a conductor 31 to one of the contacts 4 of a suitable switch 26, the con-- 'with the contact 13 of the switch 26.

nection through earth of the current. The contact 5 is connected by means'of a conductor 6 to one of the ends of the coil 7 which forms the first primary winding of the coil, 8 being the core. The other end of the winding 7 is connected to earth at m2. One of the .terminals 9 of the second source 10 of electricity is connected to earth at 'm3, while its other terminal 11 communicates by`means of the conductor 12 The contact 14 of this switch communicates by means of the conductor 15 with one of the terminals of the second primary winding 16, the other end of which is connected'by the conductor 17 to the platinum terminal 18 of the intcrrupter 19, 2() which is itself connected to earth at m4. Y

A secondary coil 21 of the spark coil has its respective ends connected in the usual way to the terminals 21 21,3 of any suitable sparking igniter. l

The operation of my invention is as follows: When the connecting bar 27 occupies the position M (F ig. 1) which corresponds to the operation with the magneto, the primary circuit is closed through the coil 7 passing by the following points: m', 1, 3, 3, 4, 27, 5, 6, 7, m2. On the other hand an auX- iliary circuit is closed through the coil 16 passing through the following points: m 1, 3, s', 4, 27, 23, 25, 22, 14, 15, 16, 17, 1e, 18, 20 and m4. This auxiliary circuit is interrupted intermittently by reason of the operation of the contact breaker 19, 20L The sudden interruptions thus caused have the eliect of producing in the core 8 variations corresponding to the variations of the magnetic flow, which causes in the winding 7 an additional induced current, which influences in corresponding proportions the cur-- rent produced in the secondary circuit 21 increasing the sparks at the sparking points. When the handle 27 takes the osition A, which corresponds to the workmg of the second source of electric current the rimary circuit is formed through the win ing 16 passing through the following points: m3, 9, 10, 11, 12, 13, 27, 14, 15, 16, 17, is, 20, m4. The sudden interruptions caused in this circuit by reason of the action of the interruptor 19, 20, cause in the core 8 a flow which gives rise to an induction current in the secondary circuit 21.

It should here be remarked that the con oints m1, m2, m3, m4 can be equally obtaine by means of suitable conductors fixed between these points. Y

Obviously the method of arrangement of the tv-o primary n indings 7 and 16 may he different from that which is shown in Fig. 1, vs hile preserving the principle on which the present invention is based. Thus for' instance, the two windings in question might be arranged each upon a separate core, Fig. 2,*marked 8 8 respectively. To each of these cores there may correspond a secondary winding 21 212, which can act separately or be coupled together.' Thehremainder of the arrangement of the system is not altered thereby nor is its operation. Further the effect of the two primary windings may be attained by means of a single windidg divided into two parts. The total number of turns of this single winding is e ual to the sum of the turns of the two win ings 7 and 16. At the end point of the number of turns corresponding to the winding 7, there is fixed the conductor 15 and at the end point ofthe winding 16 there is ixed the conductor 17. Thelconductors 15 and 17 effect on the other hand the connections shown in Fig. 1.

From the above description, it will be understood that my invention provides a compact and efficient construction in which the action of the interrupter 19 and 2O causes self-induction currents, which act to intensify the current induced in the secondary circuit 21 and strongly reinforce the sparks produced at theigniter. Further, the magneto device can be instantly cut out, and any other suitable source of electric energy substituted therefor, such as accumul-ators or batteries.

Fig. 4 illustrates my invention applied to a gas engine provided with four ,independent explosion cylinders. In this.- construction, the secondary circuit terminates on the spindle d of a suitable distributer provided with a brush b which engages successively the four contacts 1, p2, p3 and p4 such contacts being connected) by wires f1, f 2, f3 and f4 to the igniters of the res ective engine cylinders.

The axle m of the magneto armature carries a cam c, which engages a spring-pressed interrupter 20 in the primary circuit 16. The sparking'coil is placed in any convenient position, and is provided with binders 1) b2, b3, b4, and b5 for its proper connections.

Having now particularly described. and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim and desire to secure by Letters Patent of the United States is:

In an electric igniting system, the combination of an igniter and spark coil, a secondary winding on said spark coil connected to said igniter, a primary winding on said spark coil having its respective ends connected to a source of electric energy and to the earth, a second independent'primary winding on said spark coil having its ends connected respectively to an independent source of electric energy and t o the earth, an interru ter in the earth connection of said secon(4 primary winding, and a switch for controlling the connection of each of said primary windings to its source of electric energy, sald switch constructed to connect said two primary windings in parallel upon the switch adjustment for connecting the first of said windings with its source of electric energy, substantially as AUGUSTE MICHEL.

Witnesses EUGNE ProHoRN, ANDR BoRDILLoN. 

